Reverse gearing



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ATT RNEY 7 April 18, 1950 ALBEN 2,504,781

REVERSE GEARING Filed Aug. 30, 1946 I 2 Sheets-Sheet 1 WITNESSES: INVENTOR Patented Apr. 18, 1950 inevriitse GEARING .Fm'nk L. Alhen, Pittshurgh; :Bm, assignordoeste inzhouse iElefitrifi Corporation, iE-ast Bittsburgm;

n, so emi r ion of nnsylva i Amput tion Aug s 3 46, flu d-No 93i9il My invention relates, generally,- to reverse" geerings and more particularly; to combined redu-etion and reverse gearings of -a, type suitable for utilization on turbine driven locomotives and h 13 An object of'my invention, generally stated, is to grqvide a combined reduction and reverse earing wh ch shall be s mple n efficient in oper i n an wh ch mayb ecq i m q l y m nuaotur si n netall ed' A m r s e c hiect 015m? i e t n s o ni' vi a omb ned l duet on n e e s gea the having the same ee r ratio i 'bothffo we q an revers op rat on Ano h r b eo or my inve tion is to PIO I e ombined reduotioniandj reverse earing which may readily be changed ,frqm forward to reverse operation,..en.d vice verse.

Other qbie t Of my i vention wi b exp aineq h lly er inaft r or will "be apparent to those skilled in the art,

In eoe rdance with one. embodim nt otmy i iyention, a, locomotive may be driven in the. tor ward direction through a reduetigniggaring or'in, the. reverse direction "through at planetary gearihg which is so combined withithexeduotiongear: me that t g ar ratio. isfthe semeifor both on rectionsof operation.

For a better understanding .0: the nature and ohjeotsof vmy invention reterenoe may heghad;

oombined uo oniandreverseeearin embodye ns: th ummel e a u t my inv ntion;

. Rig. 2 is .a \view in ection,-v t seealon th line of Fig-. an}; I Ri 3 is a. View, in Isola ion akena ng e unem-sm p g. 1.

Referring to. the. drawing-s and. particularly to ;-Eig.. l, the s ructure shown .thenein eomprises Home L!) with. a drivingsheit U and .edriyen shaitdi pos d arem to the i g 5M1 II." The shaft l2 may be mounted; roger been i fist Brand. 44 disposedin-the ceasing 1,0, spaced relativetheshart H. may ex end through e bolle Pi io h t-t ll h h is; ro ate lt mounted nleete; bearings nd .4?! which are eiem edin-theeasme J 0- .Qneem oi: e shaft it; mato 1 tunbieeiovother mime smileoomph-mg m iemtemel: genotype;-

memeoi time.

one end of th -pinion shaft 15 by means 0! s 'ma'y be of the heli'cziopposed-type.

Iii-order'to drive the shaft 12 diregtlythrough the pinion teeth Mend the gear-23 for-forward operation of the locomotive, a fiat gear 3|, havi'rig teeth 32 on the one side, is secured to the side plate 26 of the gear 23. A clutch member 33 "is spiined one sleeve '34 which is secured to the-short F2. The clutch member 33 is provided with, teeth '35 which engage the teeth 32*on the geer 31 when the clutch is in the position shown in thedrawing Thus, torque is transmittejdirpn the shaft 1! through the pinion teeth 22, "gear 3' and h tch 33 t t af 1195 2 mt te a a redu ed; e dependi g upo he numb e h the i io l5 q'the ea 23,.

' A ho mos c ea l in Fi he luten mem r .3 ma be c uated int n out el eegement w h he r eet Z'brmean fl a yoke whlch' ivoted n the n II on :a pm 3 y is ov de wltn sh es which are disposed in a groove 39 in the clutch memb 33- As shown in 'l ig, 1, the'yokeiifi'isbiase'd to "the position s hown i-n the drawings by means of" spring 4;! which surrounds a piston rod-'42, ed; "5 s co c d o a "P 0 d s d i a cylinder Theconstruct n of th c linder? may uc t at h s o com ses the spring i'l'to disen a e the clu mem Hwfien fl re u e ui is dm t ed to h nder 63 throughva, pipe M. v

In order that he locomotive maybe on ro ed ii h x vexse di eeti h t 'th wm 'sn e -a he forw rd te tiqnhaiplane eny cat-t r INS; r mmed Thelmenetary c rrie 45 c n ains 1.. L 1jj 1anet goers tewhichare-ot thebevet 23112...- e e me h w t e leear 41- secured the-sideqplete 2 1. or theqgear- 2-; aud o b ve eeat it e umd o fl n e: 49 n he sh d; 2.

' -is ee ite o t verse th qoomotive- .4 ,is neaeeciiam hnke i 5 i ee a eoo Assn weathe -brownfieis splined in i 3 rotate and is provided with teeth 52 which engage teeth 53 provided on a flange 54 on the carrier 45.

Thus, when the brake member 51 engages the carrier 45 to prevent its rotation, the planet gears 46 function as idlers between the bevel gears 41 and 48 to reverse the direction of rotation of the shaft I2. Since the bevel gears 41 and 48 have the same number of teeth, the shaft l2 rotates in the reverse direction at a speed depending upon the number of teeth in the pini for for- 4 ion l and the gear 23, as is the case ward operation of the locomotive. r

The brake member 5i may be actuated into. and out of engagement with the planetary carrier by means of a yoke which is pivoted" to the driven shaft, a planet carrier mounted in the-housing and rotatable with the driven shaft during said one direction of rotation, planet gears j in said carriermeshin'g with said bevel gears for reversing the direction of rotation of the driven shaft, means slidably disposed in the housing in the housing I!) on a pin 56 and is constructed similarly" to the yoke St x-"previously described.

The yoke 55 is biased tothe position shown-inthe drawing by a spring 51 which surrounds a PiStOIIgIOd 58 disposed in-a cylinder 59. The

cylinder 59 may be so constructed that the spring 51; iscompressed by a piston inside the cylinder when the pressure fluid is admitted through a pipefil. 7

@It will be noted that the cylinders 43 and 59 are. so constructedthat the clutch member 33 is disengaged and the brake member 5! is engaged when pressure 'fiuid is admitted to both cylinders.

When; the pressure fluid is exhausted from the cylinders, the clutch and brake members are biased-*to-the positions'shown in the drawings by means of the springs Hand 51. The control system for the clutch and brake members may be so interlocked that the members may be actuatedonly when the locomotive is at a standstill. From the foregoing description, it is apparent that I have provided a combined reverse and reduction gearing which'is relatively simple in structure-and is capable of transmitting high amounts-of torque. The present gearing prorides for reversing the direction of operation of a. locomotive or other vehicle and maintaining the .same speed for both directions of operation. YSince numerous changes may be made in the above described construction and different em:

gearing comprising a housing, a driving shaft disposed in the housing, a driven shaft disposed in the housing in generallyparallel relation to the driving shaft, aipinion secured to the driving shaft, a gearmeshing with the pinion and rotatably mounted onthe' drivenshaft, means slidably disposed on the driven shaft for releasably engaging the gear to the driven shaft for-one direction of rotation, a bevel gear secured to saidgear, another bevel gearsecured tothe driven shaft, a planet carrier mounted in the housing and rotatable' with thedriven shaft during said one directionof rotation, planet gears in said carrier meshing with said bevel gears for reversing the direction of rotation of the driven shaft,"means slidably disposed in the housing for releasably engaging the carrier to the housing to cause said reversal of rotation through said gears, spring means for biasing said slidably'disposed means in one direction, and fluid pressure means for meansin the other direction.

simultaneously actuating said slidably disposed for releasably engaging the carrier to the housing to cause said reversal of rotation through saidgears, spring means for biasing said slidably disposed means in one direction, and fluid pressuremeans for actuating the slidably disposed irneans-in the other direction. 1

3. In a combined reduction and reverse gearing, in combination, a housing, a driving shaft disposed in the housing, a driven shaft disposed in the housing parallel tothe driving shaft, a pinion driven by the driving shaft, a spur gear meshing with the pinion and rotatably mounted on the driven shaft, means. slidably disposed on the driven shaft for releasably engaging the gear. to the driven shaft for one direction of rotation, a bevelgear secured to the spur gear, another bevel gear secured to thejdrivenshaft, a planet carrier mounted in the housing androtatable with the driven shaft duringsaid one direction of rotation, bevel, gears in the carrier meshing with said first and second-named bevel gears for reversing the direction of rotation of the driven shaft,mea-ns slidably disposed in the housing for releasably engaging the carrier to the housing to cause said reversal of rotation throughsaid gears, spring means for biasing said slidably disposed means in one direction, and fluid pressure means for actuating the slidably disposed means in the other direction,

4. In a'fc'ombined reduction and reverse gearing, in combination, ahousing, a driving shaft disposed in the housing, a driven shaft disposed in the housing parallel to the driving shaft, a pinion driven by the driving shaft, a spur gear meshing with the pinion and rotatably mounted on thedriven shaft, meansslidably disposed on the driven shaft for releasably engaging the gear to the driven shaft for one direction of rotation, a bevel gearsecured to the spur gear, another bevel gear secured to the driven shaft, a planet 'carrier rotatablewith the driven shaft during 5. Ina combined reduction and reverse gearing, in combination, a housing, a driving shaft disposed in'thefihousing, a driven shaft disposed in the housing parallel to the driving shaft, a pinion driven by the driving shaft, a'spur gear meshing with the pinion and rotatably mounted on the driven snart'ymean's slidably disposed on the driven shaft fo releasablyengagi'ng the gear to the driven shaft for 'on'dir'efction of rotation, a bevel gear secured-tothe spur gear, another bevel gear secured to the driven shaft, a. planet REFERENCES CITED carrier wlth driven shat; dmjng The following references are of record in the said one direction of rotation and having gears file of this patent:

meshing with said bevel gears, means slidably disposed in the housing for releasably engaging 5 UNITED STATES PATENTS the carrier to the housing to cause said gears to Number Name Date reverse the direction of rotation of the driven 919,538 Chevrolet Apr. 27, 1909 shaft, said bevel gears being such that the speed 926,557 Frye June 29, 1909 of the driven shaft relative to the driving shaft 2,361,357 Schmitter Oct. 24, 1944 is the same for both directions of rotation, spring 10 means for biasing said slidably disposed means FOREIGN PATENTS in one direction, and fluid pressure means for Number Country Date actuating the slidably disposed means in' the 625,847 France Apr. 30, 1927 other direction.

FRANK L. ALBEN. u 

